From 907d52310024fae6632aabfc7e833decaf185e5f Mon Sep 17 00:00:00 2001 From: Jeffle Xu Date: Thu, 1 Apr 2021 10:19:25 +0800 Subject: block: add queue_to_disk() to get gendisk from request_queue Sometimes we need to get the corresponding gendisk from request_queue. It is preferred that block drivers store private data in gendisk->private_data rather than request_queue->queuedata, e.g. see: commit c4a59c4e5db3 ("dm: stop using ->queuedata"). So if only request_queue is given, we need to get its corresponding gendisk to get the private data stored in that gendisk. Reviewed-by: Hannes Reinecke Reviewed-by: Mike Snitzer Signed-off-by: Jeffle Xu Signed-off-by: Ming Lei Signed-off-by: Jens Axboe --- include/linux/blkdev.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/linux/blkdev.h') diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d5d320da51f8..30d2090583ad 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -689,6 +689,8 @@ static inline bool blk_account_rq(struct request *rq) dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \ (dir), (attrs)) +#define queue_to_disk(q) (dev_to_disk(kobj_to_dev((q)->kobj.parent))) + static inline bool queue_is_mq(struct request_queue *q) { return q->mq_ops; -- cgit v1.2.3